On which number line do the letters represent −1 and +7? A number line from negative 8 to positive 8 in increments of 1, with only whole numbers that are multiples of 2 labeled. Place point P at the first tick mark to the left of 0. Put point Q at the seventh tick mark to the left of 0. A number line from negative 8 to positive 8 in increments of 1, with only whole numbers that are multiples of 2 labeled. Place point P at the first tick mark to the right of 0. Put point Q at the seventh tick mark to the left of 0. A number line from negative 8 to positive 8 in increments of 1, with only whole numbers that are multiples of 2 labeled. Place point P at the first tick mark to the left of 0. Put point Q at the seventh tick mark to the right of 0. A number line from negative 8 to positive 8 in increments of 1, with only whole numbers that are multiples of 2 labeled. Place point P at the first tick mark to the right of 0. Put point Q at the seventh tick mark to the right of 0.